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echo: science
to: DAVID WILLIAMS
from: Bjrn Forsstrm
date: 2007-06-13 08:19:22
subject: Freezing

->> That might be a part of the explanations but the beer was in 33 cl cans and
->> the liquor was in an 8 cl jar.
->> Another probaly is that liquor has a lower freezing-point than beer. It
->> diif 34% alchohol. 95% ethyl alcohol have a freezing point at -117.3C
->> (-179.14F). Beer freeze in the freezer where it's only -18C (-0.4F).

 DW> Did your beer freeze?

No.

 DW> It seems unlikely, after only 30 minutes in a
 DW> freezer. If the beer and liquor both remained liquid, then freezing points
 DW> are irrelevant.

If liquor don't freeze until -117C it must take longer to cool it to -18 where the
beer is aldready frozen.

 DW> The thermal conductivity of glass is far lower than that of aluminum, or
 DW> steel - whatever the cans were made of. Also, the glass wall of a bottle
 DW> is far thicker than the metal wall of a can.

I can buy that in combination with that beer freeze at a higher temp.

 DW> I guess you could try putting some liquor into a beer can, and also into
 DW> one of the regular 80 ml jars, and see which sample cools faster. I am
 DW> sure the one in the can will do so. In this experiment, only the container
 DW> is different.

That would be interesting, have to think about it.

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